如果应用程序最小化的Andr​​oid活性片段生命周期的问题 [英] Android activity and fragment lifecycle issues in case of app minimization

问题描述

我有一个多选择列表的片段。我想挽救那些在列表中当前检查的项目实例，并在情况下的应用程序最小化和这样的。

I have a fragment with a multi-choice list. I am trying to save instance of the items that are checked in the list currently and restore them in case of app minimization and such.

测试步骤：

1. 到达的多选择列表中的片段。
2. 检查几个列表项
3. preSS Home键最小化的应用程序。
4. preSS的多任务按钮，然后选择我的应用程序，以恢复它

下面是我使用的code：

Following is the code that i am using:

adapter = new ArrayAdapter<String>(getActivity(),
        android.R.layout.simple_list_item_multiple_choice,
        android.R.id.text1, listToShow);
list.setAdapter(adapter);

list.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
                    mSelectedItems.clear();
                    int count = categoryList.getCheckedItemCount();

                    SparseBooleanArray booleanArray = categoryList.getCheckedItemPositions();

                    for (int i = 0; i < count; i++) {
                            mSelectedItems.add(booleanArray.keyAt(i));
                    }

                }
            });


@Override
public void onSaveInstanceState(Bundle outState) {
        Log.d("SubcategoryselectionList", "onsavedinstancestate");
        outState.putIntegerArrayList(SELECTED_ITEM, mSelectedItems);
        super.onSaveInstanceState(outState);
    }

@Override
public void onViewStateRestored(Bundle savedInstanceState) {
    Log.d("SubcategoryselectionList", "onViewStateRestored");
    if (savedInstanceState != null) {
        if (savedInstanceState.getIntegerArrayList(SELECTED_ITEM) != null) {
            Log.d("SubcategoryselectionList", "onViewStateREstored selected items found");
            mSelectedItems = savedInstanceState
                    .getIntegerArrayList(SELECTED_ITEM);
            for (int i = 0; i < mSelectedItems.size(); i++) {
                categoryList.setItemChecked(mSelectedItems.get(i), true);
            }
        }

    }
    super.onViewStateRestored(savedInstanceState);
}

而当我看到日志，该方法 onViewStateRestored 永远不会被调用。

为了解决这个问题我想用的活性生命周期和使用它的方法 onRestoreInstanceState（）来达到上述效果，但令人惊讶的我不能看到，我加入到日志此方法。

To counter this I thought of using the activity lifecycle and use its method onRestoreInstanceState() to achieve the above mentioned effect but surprisingly I cant see the logs that I added to this method.

请人澄清在这种情况下，活动的生命周期和碎片如何工作的，我怎么能恢复在尽可能最好的方式我的状态有所帮助。

Please someone help in clarifying how the lifecycle of the Activity and Fragment working in this case and how can I restore my state in the best possible manner.

推荐答案

您应该实现的逻辑，你正在寻找的 onActivityCreated 你在哪里得到保存实例状态。

You should implement the logic of which you are looking in onActivityCreated where you get saved instance state.

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
}

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